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Your cart is empty.(V8 7.3L Diesel PowerStroke) Built for the Ford F350... Obtaining the optimum cylinder head-to-block sealing is especially critical in small displacement engines employing high compression pistons or power adders like turbochargers, nitrous oxide and superchargers. That's why ARP head studs are popular among leading Sport Compact/Import racers.You should know that ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is precisely heat-treated to 200,000 psi. Following heattreat, each stud is centerless ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part. It's important to note that lesser quality studs are not even centerless ground the material is thread rolled in bar stock form (mostly before heat-treat, when the material is easier to machine). Because ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned something that won't happen with inferior quality head studs.ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat.You will also note that ARP offers specially undercut studs for several engines. This procedure (done only to the shorter studs) more equalizes the "stretch" of both studs, which makes for a more consistent clamping force one that compensates for head gasket compression when the head is installed. This helps prevent blown head gaskets, and assures optimum sealing!
David gald
Reviewed in the United States on September 10, 2019
Worked awesome
Richard N.
Reviewed in the United States on March 12, 2013
I looked everywhere for a comparable price and couldn't find one. This is $100 less than anywhere else and it came with free shipping. You can even feel the quality put into them even before installing them. Extremely great product and will withstand the massive combustion that diesels put out when upgrading turbo and injectors. I paired these with a borg warner S400 turbo and 300cc/200% Full force injectors. My head gasket thanks you ARP!!
D. P. Thomas
Reviewed in the United States on January 24, 2012
The only reason this item is priced this high is because "they can".They feel they have the diesel community at their mercy!!
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